From 4ae39239b50b23d0b96180c147a58aa3ce81c49e Mon Sep 17 00:00:00 2001
From: Brian Ng <bng412@gmail.com>
Date: Fri, 26 May 2017 14:36:46 -0500
Subject: [PATCH] Remove import declaration when stripping flowtypes if only
 type/typeof specifiers (#5782)

---
 .../src/index.js                                 | 16 ++++++++++++++++
 .../strip-types/strip-type-annotations/actual.js |  1 +
 .../strip-type-annotations/expected.js           |  5 +++--
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/packages/babel-plugin-transform-flow-strip-types/src/index.js b/packages/babel-plugin-transform-flow-strip-types/src/index.js
index 12f5f4bb8c..28b1330f27 100644
--- a/packages/babel-plugin-transform-flow-strip-types/src/index.js
+++ b/packages/babel-plugin-transform-flow-strip-types/src/index.js
@@ -19,6 +19,22 @@ export default function ({ types: t }) {
         }
       },
 
+      ImportDeclaration(path) {
+        if (!path.node.specifiers.length) return;
+
+        let typeCount = 0;
+
+        path.node.specifiers.forEach(({ importKind }) => {
+          if (importKind === "type" || importKind === "typeof") {
+            typeCount++;
+          }
+        });
+
+        if (typeCount === path.node.specifiers.length) {
+          path.remove();
+        }
+      },
+
       Flow(path) {
         path.remove();
       },
diff --git a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/actual.js b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/actual.js
index 3d96731ccf..aff79bc078 100644
--- a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/actual.js
+++ b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/actual.js
@@ -104,3 +104,4 @@ import {typeof V2} from "foo";
 import {typeof V3, V4} from "foo";
 export interface foo5 { p: number }
 export interface foo6<T> { p: T }
+import 'foo';
diff --git a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/expected.js b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/expected.js
index adec467fc7..f8caa71ce1 100644
--- a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/expected.js
+++ b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/expected.js
@@ -92,7 +92,8 @@ var identity;
 import type from "foo";
 import type2, { foo3 } from "bar";
 
-import "foo";
 import { V1 } from "foo";
-import "foo";
+
 import { V4 } from "foo";
+
+import 'foo';